78211044 has 72 divisors (see below), whose sum is σ = 206152128. Its totient is φ = 24978240.

The previous prime is 78211039. The next prime is 78211069. The reversal of 78211044 is 44011287.

It is a super-2 number, since 2×78211044² = 12233934807139872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78210999 and 78211017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94159 + ... + 94985.

It is an arithmetic number, because the mean of its divisors is an integer number (2863224).

Almost surely, 2^78211044 is an apocalyptic number.

78211044 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78211044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103076064).

78211044 is an abundant number, since it is smaller than the sum of its proper divisors (127941084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78211044 is a wasteful number, since it uses less digits than its factorization.

78211044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945 (or 940 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 78211044 is about 8843.7008090505. The cubic root of 78211044 is about 427.6508711360.

The spelling of 78211044 in words is "seventy-eight million, two hundred eleven thousand, forty-four".